Laser Hardening Systems

Deewi Automation: Your Premier Manufacturer, Supplier, and Exporter of High-Quality Laser Hardening Machines. Our plasma laser hardening systems represent our leadership in precision manufacturing and innovative solutions designed to meet your highest requirements for workpiece surface treatment.

Innovative technology, outstanding performance

Deewi’s plasma laser hardening system uses a high-energy-density laser beam to directly act on the metal surface, which not only significantly improves the surface hardness of the workpiece, but also effectively enhances its wear resistance and corrosion resistance. Whether you are facing complex industrial components or precision manufacturing needs, Deewi’s laser hardening systems provide unparalleled solutions.
main feature:
  • High efficiency: Rapid heating and cooling processes greatly increase production efficiency.
  • Precise control: Utilize advanced control systems to ensure uniformity and accuracy of laser hardening processes.
  • Wide adaptability: Applicable to a variety of metal materials and able to meet the needs of different industries.
  • Minimized deformation: Local processing technology ensures minimal deformation of the workpiece and maintains its original shape.
  • Environmental protection and energy saving: Compared with traditional hardening methods, the laser hardening process is more environmentally friendly and consumes less energy.
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Application scenarios of laser hardening system

  • Mold Manufacturing: Enhances mold wear resistance and hardness, extending lifespan and reducing maintenance.
  • Automotive Industry: Improves surface hardness of critical parts like gears and bearings, enhancing wear resistance and fatigue life.
  • Aerospace: For components operating under extreme conditions, it boosts wear and fatigue resistance.
  • Heavy Machinery: Applied in construction, mining, and agricultural machinery components to increase hardness and durability.
  • Metal Processing: Hardens tools such as cutters and drill bits to improve cutting efficiency.
  • Medical Devices: Enhances wear and corrosion resistance of surgical tools, ensuring reliability and longevity.
  • Energy Sector: Processes critical components in wind power and oil extraction, enhancing durability and reliability.
The laser hardening system, by offering precise surface enhancement, presents an efficient and eco-friendly solution to improving component surface properties.

Quick Q&A – About Laser Hardening.

We’ve compiled a list of brief answers to common questions about the Laser Hardening Machine and Laser Hardening technology. If you’d like to delve deeper into these topics with us, you’re always welcome to contact Deewi Automation.

The laser hardening process, also known as Laser Hardening hardening, varies based on specific requirements. By using lasers of different power and energy densities and precisely controlling the duration of laser exposure, we can achieve three distinct effects in laser hardening: laser melting and solidification hardening, laser shock hardening, and laser phase transformation hardening.

Laser surface hardening is a sophisticated process. The width, depth, surface roughness, hardness, wear resistance, and microstructural changes of the laser-hardened layer are primarily related to the following factors:

  1. The power of the laser, the size of the laser spot, and the scanning speed.
  2. The composition, properties, and initial state of the material being treated, as well as any pre-treatment the material might have undergone.
  3. The geometry, dimensions, and thermodynamic properties of the surface set for hardening treatment.
  4. When setting parameters for laser hardening, the cooling rate should not be too low, otherwise, the martensitic transformation cannot be achieved. At the same time, the laser power should not be too high, as it could cause the surface of the workpiece to melt, affecting its geometry and roughness.

The range of materials suitable for the laser hardening process is extensive. For materials with different properties and melting points, we can precisely control the hardening temperature by adjusting the laser’s parameters.

Before subjecting a workpiece to laser hardening, if the surface roughness of the workpiece is low, it can affect the absorption rate of laser energy on the surface during the hardening process. Therefore, pre-treatment of the workpiece’s surface is needed before laser hardening.

  1. Surface Phosphating: After this treatment, the laser absorption rate can usually reach 70-95%. It’s suitable for medium carbon steel and cast iron. However, it’s not ideal for high-alloy steel and stainless steel.
  2. Black Paint Coating: After treatment, the laser absorption rate can typically reach 90%. It’s convenient to apply and suitable for various metal materials. However, the coating thickness is challenging to control, and laser exposure can produce glaring light and smoke. The treatment outcome can also be inconsistent.
  3. Oxide Coating: After the procedure, the laser absorption rate can usually reach 90%. It’s appropriate for all kinds of metal materials and is environmentally friendly. Utilizing spray coating technology, it offers high production efficiency, easy application, and low production costs.

Compared to traditional hardening techniques, laser hardening technology offers superior control precision and has a lesser thermal impact on the workpiece, essentially preventing deformation. Additionally, the equipment is highly versatile, allowing for multifunctional uses. The process operates with minimal noise and pollution. Here’s a detailed breakdown:

  1. The performance of materials post-hardening is significantly enhanced. Compared to traditional methods, the hardness of the hardened layer improves by 15%-20%. For cast iron materials, wear resistance can increase 3-4 times after applying laser hardening. Moreover, the depth of the hardened layer can be precisely controlled, typically ranging from 0.3mm to 1.5mm in laser surface hardening techniques.
  2. Owing to the high energy density of lasers, the process exhibits rapid heating and cooling speeds, swift thermal cycles, and is controllable. This leads to minimal thermal deformation of the workpiece, which is especially beneficial for thin-walled or elongated components. The laser hardening process has a minimal effect on surface roughness, and the hardened layer is free of cracks and defects. The thermal impact and damage to the workpiece are low, ensuring high post-hardening precision and quality. This sometimes allows laser hardening to serve as the final step in component production.
  3. Laser beams in the hardening process are precise and controllable, with a minimal divergence angle and excellent directionality. This makes it easy to treat complex-shaped components or areas difficult to access with other techniques. It also enables localized hardening of the workpiece, with adjustable parameters for different hardening methods at different locations, offering not only solutions to challenging issues but also promoting energy efficiency and environmental friendliness.
  4. Laser hardening is easily adaptable to automated mass production and can be integrated into assembly lines, leading to substantial improvements in production efficiency. It promises high precision, consistency, swift production speeds, short processing times, and reduced production costs.
  5. The flexibility of laser hardening equipment allows for multi-purpose applications, suitable for different products and locations, helping save on equipment investments and other costs.
  6. The working environment during laser hardening is cleaner, and since it doesn’t require cooling mediums like water or oil, it addresses many of the pollution and noise issues associated with traditional hardening processes.

Laser hardening is a novel technique, and its technology has not yet fully matured. At times, the outcomes can be inconsistent. Numerous factors can influence this inconsistency in laser hardening results, and it isn’t always feasible to achieve complete monitoring and control. However, by installing sensors and intelligently monitoring the laser hardening process in real-time, we can adjust the parameters as needed, ensuring a more consistent hardening outcome.

The laser hardening equipment primarily consists of four key components: the laser generator, the machine tool, the robot, and the control system.

  1. Large workpieces that cannot be easily placed inside conventional heat treatment furnaces.
  2. Components that only require hardening in specific areas such as grooves, slots, holes, edges, and cutting edges.
  3. Areas on the workpiece that cannot be reached by traditional heat treatment processes.
  4. Situations where the precision of the workpiece is crucial, and heat treatment deformation is unacceptable.
  5. Surface hardening of cast iron components is also well-suited for laser hardening.
  6. Components prone to cracking with conventional hardening methods.
  7. Workpieces whose surface hardness does not meet the requirements when using standard hardening processes.

Although laser hardening technology has not been around for a very long time, it already plays a crucial role in various fields such as petrochemicals, machinery, and metallurgy. It is used for the surface hardening of various products like guide rails, large gears, shaft necks, inner walls of cylinders, molds, shock absorbers, friction wheels, rolling mills, rollers, guide rails, cutting blades, and many more. Especially in the heat treatment of components such as gears and molds, its application is becoming increasingly widespread.

Laser Hardening Process&Applications

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